I don't know why Shroom would prefix ALL his tags on ALL his uploads with it. Smells a little like attempted sabotage, since if it had worked it wouldn't have shown up in the tag history, and someone would've had to fix all the tags manually without knowing who broke them.
Yes, it's wrong. But with this picture, all is forgiven. :-)
If you can point out what gave you the idea that all tags should be prefixed with "amb:", then we'll see if there's any potentially confusing language that should be reworded.
Well, it was back when U started uploading, I just sort of looked through http://danbooru.donmai.us/help/cheatsheet and http://danbooru.donmai.us/help/tags to get an idea of how tagging worked... a bit too quickly, it seems. I have no real excuse to be honest, I just went with "amb:" and since it didn't seem to be any problem with it, I thought that everyting was ok. Glad this was pointed out to me now, though.
Ok, just to be clear. I should keep away from "amb:"? And do tags require a prefix or is that just for some kind of clarification?
You only need to use a prefix if you're creating a new tag and want to set its type immediately. If you're using existing tags, you don't need to use any prefixes.